In November 2022, the European Commission released its proposed Euro 7 regulation for light-and heavy-duty vehicles, which limits the level of pollutants detrimental to human health, such as nitrogen oxides (NOx) and particulate matter (PM).

The proposed Euro 7 standards, which are to be implemented in 2027, set lower emissions limits than the current regulation, Euro VI, while expanding the driving conditions that are evaluated. This study provides insight into the emissions performance of the latest generation of diesel buses in Europe.

This study analyzes the real-world emissions of seven Euro VI-D trucks and evaluates the avenues for extending the in-use PEMS test provisions to better capture a wider range of frequently occurring conditions in real operation. The analysis finds that urban operation is responsible for 50% to 90% of total NOx emissions from the trucks tested.

Air pollution poses a risk to human health at levels even below the emission limits established by the World Health Organization in Europe.